package day01.System类;

import java.util.Properties;

/**
 * @author feng
 * @Date 2022/1/3 10:01
 */
public class Test01 {
    public static void main(String[] args) {
        //1.获取当前的毫秒数
        long l = System.currentTimeMillis();
        System.out.println(l);
        // 2.数组拷贝
        //获取系统属性
        Properties properties = System.getProperties();
        properties.list(System.out);
        System.out.println("系统:"+properties.getProperty("os.name"));
        //3.


    }
}
